counter

[UniSA]

Does anyone has any example in Measurement Studio for VB to measure frequency by using one counter? The data acquisition card I am using is 6221. I created a pulse signal in one counter, and try to measure the frequency by setting another counter, but it just didn't work. If anyone can provide any example code or suggestions, I will be very appreciated. Thanks in advance.

Jane 

[AlanArmstead]

Jane,

If you are using VB.NET (and you included support for .NET when you installed NI-DAQmx), then you should have the example you are looking for here: C:\Program Files\National Instruments\MeasurementStudioVS2003\DotNET\Examples\DAQmx\Counter\Measure Digital Frequency\MeasDigFrequency_Low Freq1Ctr\Vb

If you are using VB6, (and you included support for VB6 when you installed NI-DAQmx), then you should have the examples here:  C:\Program Files\National Instruments\NI-DAQ\Examples\Visual Basic 6.0

There isn't an example to do exactly what you want, but those examples will give you an idea how to program in VB6, then you can look at the example here for the frequency measurement part: C:\Program Files\National Instruments\NI-DAQ\Examples\DAQmx ANSI C\Counter\Measure Digital Frequency

-Alan A.